style.css

body {
  font-family: "Geist", sans-serif;
  min-height: 100vh;
  justify-content: center;
  align-items: center;
  display: flex;
  background-color: #ece9e4;
}

.onesignal-prompt-button {
  font: inherit;
  background-color: #f0f0f0;
  border: 0;
  color: #242424;
  border-radius: 0.5em;
  font-size: 3rem;
  padding: 0.375em 1em;
  font-weight: 600;
  text-shadow: 0 0.0625em 0 #fff;
  box-shadow: inset 0 0.0625em 0 0 #f4f4f4, 0 0.0625em 0 0 #efefef, 0 0.125em 0 0 #ececec, 0 0.25em 0 0 #e0e0e0, 0 0.3125em 0 0 #dedede, 0 0.375em 0 0 #dcdcdc, 0 0.425em 0 0 #cacaca, 0 0.425em 0.5em 0 #cecece;
  transition: 0.15s ease;
  cursor: pointer;
}
.onesignal-prompt-button:active,
.onesignal-prompt-button:hover {
  translate: 0 0.225em;
  box-shadow: inset 0 0.03em 0 0 #f4f4f4, 0 0.03em 0 0 #efefef, 0 0.0625em 0 0 #ececec, 0 0.125em 0 0 #e0e0e0, 0 0.125em 0 0 #dedede, 0 0.2em 0 0 #dcdcdc, 0 0.225em 0 0 #cacaca, 0 0.225em 0.375em 0 #cecece;
  cursor: pointer;
}